Prosecution Insights
Last updated: October 02, 2026

89Bio Inc.

Technology area: Biotechnology & Pharmaceuticals

2 pending office actions • 1 art units • 2 examiners • 0 of 2 (0%) have an AI response strategy ready

Analysis

89Bio Inc. currently manages 2 pending office actions within the Biotechnology & Pharmaceuticals technology area. These actions are distributed across 2 distinct examiners but are concentrated within 1 distinct art unit. This concentration suggests that while the portfolio involves different reviewers, the subject matter remains within a regulatory group at the patent office. The alignment with a single art unit can often lead to consistent examination outcomes as the examiners likely share similar internal guidelines and technical expertise.

The busiest examiner for this portfolio is CHO, DAVID H, who is responsible for 1 pending office action. Because the total number of pending actions is distributed among distinct examiners, the workload is shared. Practitioners should note that the single art unit designation indicates a consistent examination environment despite the involvement of different individuals. This structure allows the applicant to potentially encounter similar prior art citations or legal arguments across their pending matters, given the shared technical oversight of the unit.

Written from this page's own data; every figure is computed from USPTO records and verified before publication.

Portfolio Summary

2
Total Pending OAs
2
Non-Final OAs
0
Final Rejections
0
Advisory / Quayle

Case Difficulty Mix

Difficulty is derived from the rejection statutes on the most recent pending office action. §101-driven and multi-statute cases are graded Hard; §112-only and obviousness-type double-patenting cases are graded Easy; everything else is Medium. "Unknown" means we have not yet parsed a statute for that office action.

0
Hard (0%)
1
Medium (50%)
1
Easy (50%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§112 only1 (50%)
Double-patenting + other1 (50%)

Industry Mix

How the docket's pending cases split across USPTO tech-center bands.

1
Life Sciences
50% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
0
Semiconductors
0% of docket
0
Mechanical / Eng
0% of docket
1
Business / Other
50% of docket

Time-on-OA Estimate

Manual office-action response work runs about 10 hours per case. The time-saved bands below show what IP Author's prosecution pipeline typically delivers — a conservative 20% on the low end, 35% in the middle, 50% on the high end.

20 h
Manual time on pending OAs
4 h
Time saved (low, 20%)
7 h
Time saved (mid, 35%)
0.2 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
CHO, DAVID H 1 31.9% +67.0%
KOMATSU, LI N 1 59.8% +71.1%

Interview Candidates (2)

Cases in front of an examiner whose interview lift is 10 percentage points or more — i.e. interviewed cases historically resolve more favorably than non-interviewed ones. The top 2 ordered by deadline are shown.

App #TitleExaminerDue in
18740787 CHEMICAL SYNTHESIS OF CYTIDINE-5'-MONOPHOSPHO-N-GLYCYL-SIALIC ACID CHO, DAVID H —
17793953 METHODS FOR PROMOTING WEIGHT LOSS KOMATSU, LI N —

Top Art Units

Art UnitApps
1658 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18740787 CHEMICAL SYNTHESIS OF CYTIDINE-5'-MONOPHOSPHO-N-GLYCYL-SIALIC ACID CHO, DAVID H — §112 Non-Final OA — Pending Jun 12, 2024
17793953 METHODS FOR PROMOTING WEIGHT LOSS KOMATSU, LI N 1658 §103§112DP Non-Final OA — Pending Jul 20, 2022

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